1999 Dodge Dakota, 5.2 V8, hard start problems. Car won't start by just turning the key. Some times you will get rapid clicking when turning it over. If you pump the gas and turn it over you can get it to start, but you have to keep the RPM's up or the car dies. If you keep the RPM's up for 5-10 minutes it will finally idle on it's own. Any ideas?